大地测量仪圆台型永磁体建模仿真

Modeling and Simulating on Cone Permanent Magnet of Geodetic Instruments

大地测量仪器中圆台型永磁体由于安装调试要求,需要在沿径向圆周排列若干通孔。通过预测磁体表磁大小后,才能确定磁轭和电磁检测电路的取值范围。但传统计算磁场的方法无法智能识别三维非对称磁体模型,从而导致解与实际值偏差过大。提出了一种半自动的等分三维建模和网格划分的方法,并通过ANSYS仿真成功的解决了自动网格划分智能识别的问题。利用ADPL命令流进一步简化了圆台型永磁体建模过程和网格划分过程。通过实体成品实测值和软件仿真后对比,仿真结果误差在2%以内。结果表明,上述方法为永磁体的设计提供了有效参考。

In cone permanent magnet manufacture of geodetic instruments, a number of clearance holes are ar- ranged in an annulus for configuration and installation requirements. Stimulator for permanent magnet can be used to identify range of value for dimension of magnetic yoke and electromagnetic inspection circuit. Traditional magnet cal- culation method cannot model and mesh asymmetrical permanent magnet intelligently, which causes solution have de- viation in forecasting precision. A semi-automatic trisection 3D modeling and meshing method was specified in this work, which employs ANSYS to model and mesh asymmetrical permanent magnet intelligently. The processes of mod- eling and meshing were further simplified by ADPL command flow. The comparison experiment of the calculation re- sult and measurement value of product proves that the margin of error is less than 2 percentage. The results show that the design method of this permanent magnet has significant demonstration value, thus provides an advice.